The fact that a couple of sonic booms caused the 911 system to be overwhelmed with calls surprises me.
I wonder how many of the people that called or attempted to call 911 had enough (or thought they had enough) detail to even allow the police/fire to investigate. Calling 911 to say that you (and half of town) heard a loud noise but you have no idea where it came from or what caused it probably is not very helpful. I wonder if any campaigns are being discussed to educate the public on when they should apply some sort of filter to their thought process before calling 911.
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"There is not a man of us who does not at times need a helping hand to be stretched out to him, and then shame upon him who will not stretch out the helping hand to his brother." -Theodore Roosevelt